Puanooraph co



r Q ad J. H. McCAIN.

AMMONIA COMPRESSOR.

APPLICATION FILED nsc.29. ma.

1,308,288. Patented July 1, 1919.

2 SHEETS-SHEET l.

l. H. McCAIN.

AMMONIA COMPRESSOR.

APPLICATION men 1150.29, 1916.

2 SHEETS-SHEET 2.

' 1,308,288. Patented July 1, 1919.

THE COLUMBIA vLANounAPu $0., WASHINGTON, D. c.

rasgasg UNITED, STATES P TENT OFFICE.

i JosErIITHARvEy McCAIN, or PHI AD LPHIA,rmmsrnvhnm.

3 immomacmaassbe. 1

To. all whom it may 0mm.-

fectly control theflow of L y A further object isto provideimproved means'for'adjusting the valve seats so as to prevent leakage and permit replacementof worn or in ured parts.

With these and j other objects in view the invention consistsfin certain novel features of construction and combinations ofpajrt as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings:

Figure 1 is a view in side elevation, illustrating my improvements.

Fig. 2 is a view in end elevation.

Fig. 3 is a view in section on the line 3-3 of Fig. 4, and

Fig. 4 is aview in longitudinal section on an enlarged scale, on the line 4.-4 of Fi 2. l

1 represents the bed of my compressor, having a standard 2 at one end lined to form the compression cylinder 3, and provided at its guide 4, and a shaft bearing 5 6 is the drive shaft having the ordinary fly-Wheel 7, and provided with a crank arm 8, connected by a rod 9 with a cross head 10.

The cross head 10 is connected to the piston rod 11, and the latter is provided with a piston 12, in cylinder 3. The piston 12 is made in two halves, 13 and 14, the former having a recess 15 to receive an annular enlargement 16 on rod 11, and the latter internally screw-threaded as shown at 17 to screw on to the threaded endlS of rod 11.

A pin 19 holds the piston section 14 from accidental turning movement, yet permits the piston to be removed whenever desired.

To opposite sides of the standard 2, heads 20 and 21 are secured by means of screws 22. These heads 20 and 21 are in most respects precisely alike. They each have hols 1 Specification of Letters Patent.

Be itknown hat. I, Josnrri H. Moo s, a

adjustment to prevent leakage, to pen other end with a cross head .Apfinatioamdnecmber aa iai. "saajiia m. 1

35? a r n @n i afi ll f, th yl 'der3. p y p Hea d 21 is provided with a bearing 24,

10. tasters {23 sgiasringwaa cylinder through which the rod 11projects, head 20 has ant inwardly projecting. enlargement 2'5}correspondingin size to the size of the hearing so. as toj insure an equal dispIace ment'at both ends .of. the cylindeni r The heads 20jandf2l a t san provided with inlet and exhaust valves 26. and re spectively. Allfofthese valves engage removab v lv tat :28, having tapering ner ends which engage tapering shoulders 30 int theheads, and held tightly in place by et-scr vsfiL I 3 ash v s masc r 1 .32 guided a barrel 33,. and eachbarrel is made with s a e has rin ag a valve seats 28. "Screw-threaded blocks 35 ss ssr weainta hs h s and a n,.th f wings surrduliding the barrels 33.

BI constitute retaining members and carry the set-screws 31 which press the heads 34 agamst the seats 28, and permit adjustment of the parts to insure a gas tight junc ture.

Coil springs 36 are located in the barrels 33, and hold the valves normally in closed position. Screw-threaded plugs 37 i are screwed into the outer ends of the barrels closing them, and operating to permit adjustment of the springs for the exhaust valves 27 Removable caps 38 inclose the outer ends of the barrels 33, and in fact, close the outer ends of the valve casings indicated by the reference numeral 39. The valve casings at each end of the cylinder, are vertically disposed and afford areadyconnection for the supply and exhaust pipes 40 and 41 respect1ve y.

These pipes 40 and 41 are connected with suitable manifolds 42, and the latter are provided with valves 43 which control the flow of fluid as may be desired.

The cylinder 3 is water-jacketed as shown at 44, and this water jacket 44 connects with water chambers 45 in the heads 20 and 21.

The operation of my improved compressor is as follows: i

. The reciprocation of piston 13 causes an intake of gas and a compression and exhaust thereofat both ends of the cylinder, so that the maximum of capacity may be had, but if desired, the valves 43 may be operated so as to compress at one end ofthe cylinder only. In the event of injury to any of the parts of the valves or their seats, repairs and alterations can be made Without putting the compressor entirely out of commission, and all parts can be adjusted to suit conditions. By reason of the enlargement 25.,

and the stuffing box 24, anypossibility of the inlet valves 26 falling into the cylinder I vention, and hence I do not limit myself to theprec'ise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall Within the spirit and scope of the appended claims.

, a I-IavingMfully described my invention,

What I claim as newand desire to secure by Letters Patent is: I 1. In an ammonia compressor, the combination of a valve easlng having a reduced -inner end, a valve seat'member removably fitted against the inner endof the casing,

Copies of this patent may be obtained for the seat member, valve mechanism carried .by the valve, a retaining member threaded into the valve casing, set screws carried thereby for holding the barrel and removable seat member in position, a gas tight closure for the end of the barrel and threaded therein and a cap separate from said retaining member and closure, closing the outer end of the casing.

2. .An ammonia compressor, comprising a cylinder, a valve caslng on the cylinder and having a reduced inner end, a valve seat removably located against the inner end of the casing, abarrel having an enlarged head engaging the seat, a block having a central opening receiving the barrel and screwed into the casing, set-screws in the block pressing the head against the valve seat, a valve, a stem on the valve projecting into the barrel, and a spring in the barrel normally holding the valve in closed position.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

JOSEPH HARVEY MCCAIN.

Witness ELEANOR F. MURRAY.

five cents each, by addressing the Commissioner 0! Patents,

Washington, 13.0." 

